I'm trying to get my top cylinder to fire consistantly on my '78 Mariner 40BE.I put in a new coil,but that did 'nt fix it.In the prosess of shopping for it ,I ended up with an ignition coil that goes under the flywheel.Should I put it in ?Could that fix my problem?I've got compression.Is this motor really suppose to run on a 100 to 1 fuel mix?